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ZX-59601798242025年9月美国B卷 · 第 15 题
2025年9月美国B卷 · 原库模块 2 · Q15 原库参考解析
At the beginning of an experiment, the temperature of a liquid is 23 degrees Celsius (°C). During the first 4.0 minutes of the experiment, the temperature of the liquid increases at an average rate of 6.5°C per minute. Then, the temperature of the liquid increases at a constant rate of 2.4°C per minute. If the temperature of the liquid reaches \( 63^{\circ}\text{C} \) x minutes after the beginning of the experiment, where \( x>4.0 \), which equation represents this situation?
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